EP2219297A1 - Elektrisch betriebene Kommunikationsvorrichtung - Google Patents

Elektrisch betriebene Kommunikationsvorrichtung Download PDF

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Publication number
EP2219297A1
EP2219297A1 EP09250372A EP09250372A EP2219297A1 EP 2219297 A1 EP2219297 A1 EP 2219297A1 EP 09250372 A EP09250372 A EP 09250372A EP 09250372 A EP09250372 A EP 09250372A EP 2219297 A1 EP2219297 A1 EP 2219297A1
Authority
EP
European Patent Office
Prior art keywords
connection
power supply
data
plt
modem
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP09250372A
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English (en)
French (fr)
Inventor
designation of the inventor has not yet been filed The
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Telecommunications PLC filed Critical British Telecommunications PLC
Priority to EP09250372A priority Critical patent/EP2219297A1/de
Publication of EP2219297A1 publication Critical patent/EP2219297A1/de
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/542—Systems for transmission via power distribution lines the information being in digital form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5483—Systems for power line communications using coupling circuits
    • H04B2203/5487—Systems for power line communications using coupling circuits cables

Definitions

  • This invention relates to electrically powered communications devices, and in particular devices intended for communication with each other over a local network, such as within domestic premises.
  • a local network such as within domestic premises.
  • These other devices may be general-purpose computers, or dedicated terminals for connection to internet streaming or broadcast services, voice terminals (VoIP telephones), monitoring equipment, or for other specific purposes.
  • a further method makes use of an existing cable system already present throughout most premises - namely the electricity supply. It is possible to carry data over the internal house wiring, using special transceivers connected to the mains wiring through conventional electric power sockets. This technology is known as "power line telecommunications (PLT)".
  • PLT power line telecommunications
  • Typical PLT systems use multiple carriers and different timeslots for data injected onto the mains electricity network.
  • the system is an application of orthogonal frequency division multiplex - OFDM - technology. Effectively a comb of carriers, from 4MHz to 30MHz or so, switch on and off in different timeslots. These carrier frequencies are very much higher than the standard electricity supply, which is typically at 50-60Hz depending on national standards. It may be necessary to install a filter between the internal wiring and the external mains supply to prevent signals straying into or out of the domestic circuits, but otherwise no modification to the internal circuits of the building is normally required to install such a system in a domestic or business premises.
  • PLT systems also exist that communicate over longer distances, making use of the utility operators' low voltage mains supply networks.
  • Figure 1 depicts a conventional PLT modem 1 connected to a data communications device 2 to a data network carried by a household mains electrical supply.
  • the modem 1 has an Ethernet or USB connection 3 to carry data to and from a complementary connection 4 on the data communications device 2. It also has an electrical power supply 5 attached to a conventional electrical plug 6.
  • the plug 6 and modem 1 are often integrated into one unit, with no cable 5 between them.. Further ethernet connections 7 may be provided for connection from the PLT unit 1 to further devices.
  • the conventional data communications device 2 has various functional elements depicted generally at 25, 26, 27, 29. These will vary in detail from one device to another depending on the purpose of the individual device, so will not be described in detail here.
  • the PLT modem extracts data from the high frequency PLT data carrier signals, and can also apply outgoing data on to the carriers.
  • the data communications device 2 requires a power supply, for which a separate cable 8 and plug 9 are required. This arrangement therefore requires two power sockets to be available for the device to be used.
  • Each device to be connected to the network requires a separate PLT modem through which it may be connected, unless they are all close enough to the same PLT modem to allow connection through additional cables as depicted by reference numeral 7.
  • FIG. 2 shows an alternative prior art configuration in which the power management system 29 (transformer and rectifier) and the PLT functions 1 are combined in a single unit 19 connected to (or integral with) one plug 69.
  • This arrangement only requires a single power socket, but still requires a separate unit 19 to be provided, and for the user to make two separate connections 4, 8 to the data communications device 2.
  • the relatively bulky power / PLT unit 19 can be difficult and untidy to accommodate close to the data communications device 2 itself. If it is integrated with the plug 69 it provides a relatively bulky unit to connect to the electric power socket, and results in two relatively long cables 3, 8 which can get entangled with each other, and with any other cables connected to the same socket, or to the data communications device 2.
  • the present invention provides an electrically powered communications device comprising a housing, within which are located a transceiver for receiving and transmitting data, a power supply management system for connection to a power supply and distributing power to the transceiver and other components of the device, and an integral power line telecommunications modem for connection to a power supply connection and enabled so that network data carried on the power connection is extracted and delivered to the transceiver, and network data generated by the transceiver is modulated onto the power connection.
  • the device may be connected to the network without a separate intermediate modem. This allows the device to be moved from a first location to a second location without the need to provide a separate PLT device at the second location, or to move such a PLT device from the first location to the second location, thereby losing connectivity for any other devices at the first location.
  • the physical embodiment may comprise one or more electronic components configured to perform these various functions.
  • a data communications device 20 has a data input/output unit 25 for exchanging data with other devices over a communications network, and also has a human interface 27 for receiving instructions from a keyboard, tracker ball, remote control interface, etc and for displaying outputs in visual, audio, haptic or other forms. The exact nature of these interfaces depends on the purpose of the device.
  • the device may also have sensors or controls, (not shown) (either internal or external) for monitoring and controlling phenomena such as temperature, depending on the intended purpose of the device.
  • the various inputs and outputs 25, 27 are mediated by a data handling function 26, which may comprise a central processor and one or more data stores. These functions 25, 26, 27 all draw power from a power management unit 29.
  • the device 2 is connected by a cable 58 to a conventional electrical plug 69.
  • the cable and plug combine the functions of the separate cables 5, 8 and plugs 6, 9 in the prior art system depicted in Figure 1 .
  • the cable 58 is connected to a PLT modem 21 housed within the device 20, which is depicted in more detail in Figure 4 .
  • the integral PLT unit 21 operates in a similar way to the prior art separate PLT unit 1 ( Figure 1 ), but the external connections are different.
  • power is delivered to the PLT unit 21 from a connection 58 and delivered to the power management unit 29 ( Figure 3 ) through a connection 28.
  • a signal is extracted from this mains feed (31) and transformed via a line coupling function 32 to a form suitable for low voltage data handling.
  • a modulator 34 similarly imposes outgoing data onto one (or more) high frequency carriers, which is then coupled to the mains via the line coupling function 32. Depending on the addressing system used by the PLT system, this output may be on the same carrier frequency(ies) as the incoming data, or a different as the modulation scheme requires.
  • the data handled by the modem 34 is exchanged with the transceiver 25 ( Figure 3 ) through a connection 24.
  • the modulator 34 requires a power supply to generate and receive the signals. This may be provided from the input/output feed 24 or, as shown, from the mains supply.
  • the device may be transferred from one location to another connected to the enabled mains network without the need to provide a separate PLT device at the second location, or to lose connectivity for any other devices at the first location.
  • An ethernet or USB connection 4 may also be provided on the data communications device 20 so that it can be used in conventional manner at locations where a PLT- enabled mains network is not present. If the device 20 is a telecommunications "hub", a suitable connection to the external telecommunications network is also required, communication with the peripheral devices then being made using the PLT-enabled connection 58.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephonic Communication Services (AREA)
EP09250372A 2009-02-13 2009-02-13 Elektrisch betriebene Kommunikationsvorrichtung Ceased EP2219297A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09250372A EP2219297A1 (de) 2009-02-13 2009-02-13 Elektrisch betriebene Kommunikationsvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09250372A EP2219297A1 (de) 2009-02-13 2009-02-13 Elektrisch betriebene Kommunikationsvorrichtung

Publications (1)

Publication Number Publication Date
EP2219297A1 true EP2219297A1 (de) 2010-08-18

Family

ID=40823560

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09250372A Ceased EP2219297A1 (de) 2009-02-13 2009-02-13 Elektrisch betriebene Kommunikationsvorrichtung

Country Status (1)

Country Link
EP (1) EP2219297A1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070091925A1 (en) * 2005-10-20 2007-04-26 Matsushita Electric Industrial Co., Ltd. Power line communication apparatus and data relay method
US20070198748A1 (en) * 2006-02-01 2007-08-23 Leviton Manufacturing Co., Inc. Power line communication hub system and method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070091925A1 (en) * 2005-10-20 2007-04-26 Matsushita Electric Industrial Co., Ltd. Power line communication apparatus and data relay method
US20070198748A1 (en) * 2006-02-01 2007-08-23 Leviton Manufacturing Co., Inc. Power line communication hub system and method

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